Navigation system for vehicles
First Claim
1. A vehicular navigation system for determining an optimal route for travel of a vehicle to a destination comprising:
- present position determination means for determining present position of the vehicle;
an information storage unit for storing road data for searching for the optimal route;
traffic information acquiring means for acquiring current traffic information;
area setting means for setting an area as a given range from a location at or near the present position of the vehicle; and
route searching means for identifying, from among the stored road data, road data pertaining to the set area, for selecting, from among the acquired current traffic information, traffic information corresponding to the identified road data, for changing the identified road data in accordance with the selected traffic information and for searching the road data, inclusive of the changed road data, to determine the optimal route.
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Accused Products
Abstract
The vehicle navigation system suggests route to a destination and repeats searching for a new optimal route in response to changes in traffic conditions near the present position of the vehicle. The system includes a present position calculator 4A for calculating the present position of the vehicle, an information storage unit 3 for storing road data 3B for searching, a traffic information receiver 4F for acquiring traffic information 5, a route searcher 4B for searching for the optimal route from the present position to the destination based on a navigation program 3A, the road data, and the acquired traffic information, and an area setter 4C for setting a given range near the present position of the vehicle, whereby the route searcher selects and acquires traffic information corresponding to the road data within the set area, and searches for the optimal route by first changing road data based on the acquired traffic information.
332 Citations
21 Claims
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1. A vehicular navigation system for determining an optimal route for travel of a vehicle to a destination comprising:
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present position determination means for determining present position of the vehicle; an information storage unit for storing road data for searching for the optimal route; traffic information acquiring means for acquiring current traffic information; area setting means for setting an area as a given range from a location at or near the present position of the vehicle; and route searching means for identifying, from among the stored road data, road data pertaining to the set area, for selecting, from among the acquired current traffic information, traffic information corresponding to the identified road data, for changing the identified road data in accordance with the selected traffic information and for searching the road data, inclusive of the changed road data, to determine the optimal route. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A vehicular navigation system for determining an optimal route for travel of a vehicle to a destination comprising:
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present position determination means for determining the present position of the vehicle; an information storage unit for storing road data for searching for the optimal route; traffic information acquiring means for acquiring current traffic information; area setting means for setting an area as a given range from a location at or near the present position of the vehicle; neighborhood data acquiring means for acquiring neighborhood road data for said set area; neighborhood data memory means for storing said acquired neighborhood road data; and route searching means for selecting, from among the acquired current traffic information, traffic information corresponding to the neighborhood road data, for changing the neighborhood road data in accordance with the selected traffic information and for searching the road data, inclusive of the changed neighborhood road data, to determine the optimal route. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification